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Finding the Fourth Proportional to 263.40, 363.94 and 208.36

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Solution

The fourth proportional to 263.40, 363.94 and 208.36 is: 287.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.40 : 363.94 = 208.36 : x
  2. Step 2: Convert to fraction form
    263.40/363.94 = 208.36/x
  3. Step 3: Cross multiply
    263.40x = 363.94 × 208.36
  4. Step 4: Simplify right side
    263.40x = 75,830.54
  5. Step 5: Solve for x
    x = 75,830.54/263.40
  6. Step 6: Final answer
    x = 287.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.